There are 3 definitions of r in English:

r1

Line breaks: r
Pronunciation: /ɑː
 
/

abbreviation

1Recto.
1.1(Giving position or direction) right: l to r: Evan, Nic, and David
1.2 Law Rule: under r 7.4 (6) the court may hear an application immediately

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1Radius: 2πr
1.1 Statistics Correlation coefficient: sigmoidoscopic and symptom scores also showed a significant correlation with each other (r = 0.91)

Definition of r in:

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Word of the day hubris
Pronunciation: ˈ(h)yo͞obris
noun
excessive pride or self-confidence

There are 3 definitions of r in English:

R2

Line breaks: R
Pronunciation: /ɑː
 
/
(also r)

noun (plural Rs or R's)

1The eighteenth letter of the alphabet.
1.1Denoting the next after Q in a set of items, categories, etc.

Phrases

the R months

The months with R in their names (September to April), considered to be the season for eating oysters.

the three Rs

Reading, writing, and arithmetic, regarded as the fundamentals of learning: why couldn’t they just leave well alone and let pupils concentrate on the three Rs?
More example sentences
  • An annual poll of headteachers shows that increasing numbers of them think the policies being used to improve pupils' grasp of the three Rs in primary schools are working.
  • Perhaps society would be better off if its schools stuck to the three Rs and did a solid job in domains where they enjoy both competence and wide public support.
  • Researchers identified a steady rise in time spent on the three Rs by juniors in England over the six years to 2002.

Definition of r in:

There are 3 definitions of r in English:

R3

Line breaks: R
Pronunciation: /ɑː(r)
 
/

abbreviation

1Rand: a farm worth nearly R1,3 million
1.1(In names of sports clubs) Rangers or Rovers: Berwick R Featherstone R
1.2Réaumur (a temperature scale, now obsolete): 198.6 °R
1.3Regina or Rex: Elizabeth R
1.4 (also ®) Registered as a trademark.
1.5(In the US) Republican.
1.6North American (In film classification) restricted (denoting films restricted to viewers over a certain age).
1.7(On a gear shift) reverse.
1.8 (R.) River (chiefly on maps).
1.9Roentgen(s).
1.10Romania (international vehicle registration).
1.11Rook (in recording moves in chess): 21.Rh4
1.12 Cricket (On scorecards) run(s).

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1 Chemistry An unspecified alkyl or other organic radical or group.
[abbreviation of radical]
1.1Electrical resistance.
1.2 Chemistry The gas constant.

Definition of r in: